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Security Bulletin: MQ Explorer directory created with owner '555' on Linux x86-64 vulnerability affects IBM MQ (CVE-2016-6089)

Security Bulletin


IBM MQ including MQ Explorer installed on Linux x86-64 environment. After the completion of installation, all directories under opt/mqm/mqexplorer/eclipse are created with owner "555" (non-existant user) and group mqm. This vulnerability allows a local user to alter the contents of the opt/mqm/mqexplorer/eclipse directory and make the product unusuable.

Vulnerability Details

CVEID: CVE-2016-6089
 IBM WebSphere MQ could allow a local user to write to a file or delete files in a directory they should not have access to due to improper access control.
CVSS Base Score: 4
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

IBM MQ v9.0.0.0

IBM MQ v9.0.1


IBM MQ v9.0.1

Apply IBM MQ v9.0.2

IBM MQ v9.0.0.0

Apply IBM MQ v9.0.0.1

Workarounds and Mitigations


Get Notified about Future Security Bulletins



Change History

31 May 2017: Original version published

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
15 June 2018